Energy Practice Questions
GCSE · GCSE Physics · 142 free MCQs with instant results and detailed explanations.
142
Total
47
Easy
72
Medium
23
Hard
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Sample Questions from Energy
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Q1
Easy
What is the unit of energy in the International System of Units (SI)?
A.
Joule
B.
Newton
C.
Watt
D.
Kilowatt
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Correct Answer: A
The SI unit of energy is the Joule (J). It is a derived unit that measures the amount of work done when a force of one newton moves an object one meter.
Q2
Easy
A light bulb uses 60 Joules of energy every second. How much energy does it use in 10 seconds?
A.
600 Joules
B.
60 Joules
C.
6000 Joules
D.
6 Joules
Show Answer & Explanation
Correct Answer: A
The energy used in 10 seconds is calculated by multiplying the power (60 Joules/second) by the time (10 seconds). Thus, 60 J/s * 10 s = 600 Joules.
Q3
Easy
Which of the following forms of energy is associated with the motion of an object?
A.
Kinetic Energy
B.
Potential Energy
C.
Thermal Energy
D.
Chemical Energy
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Correct Answer: A
Kinetic energy is the energy an object possesses due to its motion. The more mass or speed the object has, the more kinetic energy it possesses.
Q4
Medium
Which of the following forms of energy is primarily stored in a compressed spring?
A.
Kinetic energy
B.
Gravitational potential energy
C.
Elastic potential energy
D.
Chemical energy
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Correct Answer: C
A compressed spring stores energy in the form of elastic potential energy, which is the energy stored when it is deformed.
Q5
Medium
What happens to the kinetic energy of a pendulum at its highest point?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It converts to thermal energy
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Correct Answer: B
At the highest point of its swing, the pendulum's kinetic energy decreases as it converts into potential energy, reaching maximum potential energy at that point.
Q6
Medium
A car of mass 1200 kg is moving at a speed of 20 m/s. What is its kinetic energy?
A.
240,000 J
B.
480,000 J
C.
300,000 J
D.
600,000 J
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Correct Answer: A
Kinetic energy (KE) is calculated using the formula KE = 1/2 mv². Here, m = 1200 kg and v = 20 m/s, so KE = 1/2 * 1200 * (20)² = 240,000 J.
Q7
Medium
Which of the following energy transformations occurs in a hydroelectric power station?
A.
Mechanical to electrical
B.
Nuclear to thermal
C.
Kinetic to chemical
D.
Thermal to nuclear
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Correct Answer: A
In a hydroelectric power station, the potential energy of water is converted into kinetic energy as it flows down, and then this kinetic energy is converted into electrical energy as it turns turbines.
Q8
Hard
A 5 kg object is lifted to a height of 10 meters. Calculate the gravitational potential energy gained by the object. (Use g = 9.8 m/s²)
A.
490 J
B.
980 J
C.
245 J
D.
550 J
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Correct Answer: A
The gravitational potential energy (GPE) is calculated using the formula GPE = mass × gravity × height. Here, GPE = 5 kg × 9.8 m/s² × 10 m = 490 J.
Q9
Hard
A 2 kg object is lifted to a height of 5 meters. What is the gravitational potential energy gained by the object? (Use g = 9.8 m/s²)
A.
98 J
B.
78 J
C.
88 J
D.
58 J
Show Answer & Explanation
Correct Answer: A
The gravitational potential energy (GPE) is calculated using the formula GPE = mgh, where m is the mass (2 kg), g is the acceleration due to gravity (9.8 m/s²), and h is the height (5 m). Thus, GPE = 2 kg * 9.8 m/s² * 5 m = 98 J.
Q10
Hard
A heating element consumes 1500 Watts of power for 2 hours. How much energy in kilowatt-hours (kWh) does it consume?
A.
1 kWh
B.
3 kWh
C.
2 kWh
D.
4 kWh
Show Answer & Explanation
Correct Answer: B
Energy consumed (in kWh) is calculated by multiplying power (in kW) by time (in hours). The power is 1500 W, which is 1.5 kW. For 2 hours, energy = 1.5 kW * 2 h = 3 kWh. Therefore, the correct answer is B.
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Energy — GCSE GCSE Physics Practice Questions Online
This page contains 142 practice MCQs for the chapter Energy in GCSE GCSE Physics. The questions are organized by difficulty — 47 easy, 72 medium, 23 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.